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Finding the Fourth Proportional to 71,673.91, 98,910.11 and 39,842.53

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Solution

The fourth proportional to 71,673.91, 98,910.11 and 39,842.53 is: 54,982.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,673.91 : 98,910.11 = 39,842.53 : x
  2. Step 2: Convert to fraction form
    71,673.91/98,910.11 = 39,842.53/x
  3. Step 3: Cross multiply
    71,673.91x = 98,910.11 × 39,842.53
  4. Step 4: Simplify right side
    71,673.91x = 3,940,829,024.98
  5. Step 5: Solve for x
    x = 3,940,829,024.98/71,673.91
  6. Step 6: Final answer
    x = 54,982.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.